RT12864M LCD module MCU driver

/*------External crystal oscillator is 12MHz-------*/           
 /*--------Last modified 2011.02.26-------*/

#include "STC12C5620AD.h"
#include "RT12864M.h"
#include "delay.h"
/**************************Custom character encoding****************************/
unsigned char code CGROM_Code[]={0x00,0x00,0x00,0x00,0x7F,0xFE,0x60,0x06,0x33,0xCC,0x19,0x98,0x0C,0x30,0x06,0x60, 0x03,0xC0,0x01,0x80,0x01,0x80,0x01,0x80,0x01,0x80,0x01,0x80,0x01,0x80,0x01,0x80,0x01,0x80,0x01,0x80
           , //Antenna graphics
          0x00,0x00,0xE0,0x00,0xA0,0x00,0xEE,0x00,0x1B,0x00,0x31,0x00,0x30,0x00,0x30,0x00,
         0x30,0x00,0x30,0x00,0x31,0x00,0x1B,0x00,0x0E,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; //Celsius graphics 
/**********************LCD test is busy****************************/
bit LCD_Test_Busy(void)        
  {
   bit Temp;
   LCD_DATAPORT=0xff; //Data port all set first
   LCD_RS=0;
   LCD_RW=1;
   LCD_E=1;
   Temp=(bit)(LCD_DATAPORT & 0x80); //Take the highest bit, 1 is busy
   LCD_E=0;
   return Temp;
  }
/*************************LCD write command******************************/
void LCD_Write_CMD(uchar cmd)
  {
 while(LCD_Test_Busy()); //First check if LCD is busy
 LCD_RS=0;
 LCD_RW=0;
 LCD_E=1;
    LCD_DATAPORT=cmd; //Write command
 LCD_E=0;
  }
/*************************LCD write data**************************/
void LCD_Write_DATA(uchar Inputdata)
  {
 while(LCD_Test_Busy()); //First check if LCD is busy
 LCD_RS=1;
 LCD_RW=0;
 LCD_E=1;
    LCD_DATAPORT=Inputdata; //Write data
 LCD_E=0;
  }
/************ Write custom characters or graphics to CGRAM *****************/
void LCD_Write_CGRAM(uchar *Char_Code)
{
 uchar i;
 LCD_Write_CMD(0x34); //Open extended instructions                  
 LCD_Write_CMD(0x02); //SR=0, allow input of CGRAM address
 LCD_Write_CMD(0x30); //Restore basic instructions
 LCD_Write_CMD(0x40); //CGRAM address
 for(i=0;i<32;i++)
  {
   LCD_Write_DATA(Char_Code[i*2]);
   LCD_Write_DATA(Char_Code[i*2+1]);
  }
}
/**********************Set operation address**************************/
void LCD_Set_XY(uchar x,uchar y)
{
 uchar Address;
 switch(x)
 {
 case 0: 
     Address = 0x80 + y;
     break; 
    case 1: 
     Address = 0x90 + y;
  break;         
 case 2: 
  Address = 0x88 + y;
  break; 
    case 3: 
  Address = 0x98 + y;
  break; 
 default:
  Address = 0x80 + y;
  }
    LCD_Write_CMD(Address); 
}
/*************************Display a CGRAM******************************/
/**************Parameters: row number, column number, CGRAM to be displayed********************/
void LCD_Display_CGRAM(uchar x,uchar y,uchar add1,uchar add2)
{ 
    LCD_Set_XY(x,y); //First determine the display row and column       
 LCD_Write_DATA(add1);
 LCD_Write_DATA(add2);
}
/**************Display a string at X (row) Y (column)********************/
void LCD_Display_String( uchar x,uchar y,uchar *str )
  {
    LCD_Set_XY(x,y); //First determine the starting row and columnwhile
 (*str!='') 
      {
        LCD_Write_DATA(*str);
     str++;
   }
  }

/**************Display value at X (row) Y (column)************************/
void LCD_Display_Value( uchar x,uchar y,uchar val )
{
 LCD_Set_XY(x,y); //Determine the starting row and column first
 LCD_Write_DATA(val);
}
/**************Display array at X (row) Y (column)************************/
void LCD_Display_Array( uchar x,uchar y,uchar *Array,uchar Lenth )
{
 LCD_Set_XY(x,y); //Determine the starting row and column firstwhile
 (Lenth--)
  {
   LCD_Write_DATA(*Array);
   Array++;
  }
}
/*****************************LCD initialization**************************/
void LCD_Init(void)
{
 LCD_RST=0;
 Delay_us(10);
 LCD_RST=1; //LCD reset
    LCD_Write_CMD(0x30); //Function setting (parallel, basic instructions)   
    LCD_Write_CMD(0x0c); //Overall display, cursor
    LCD_Write_CMD(0x01); //Clear screen
 LCD_Write_CMD(0x06); //Move cursor right, not overall
 LCD_Write_CGRAM(CGROM_Code); //Write custom characters
}

This is a subroutine header file and schematic diagram extracted from a complete project. Please go to http://www.51hei.com/bbs/dpj-19294-1.html  to download it.